Half Life & Half Life Blue Shift & Half Life Op... Online

: Introduced iconic equipment like the HEV Suit and the Crowbar .

: Players face both invading aliens and the HECU military sent to cover up the incident. Half-Life: Opposing Force (1999) Half Life & Half Life Blue Shift & Half Life Op...

: During a routine experiment, a "resonance cascade" occurs, tearing a rift between Earth and the borderworld, Xen. Key Features : : Introduced iconic equipment like the HEV Suit